By William Ward Watkin:

Watkin, William Ward, "The Middle Ages: the approach to the truce of God", Western Traditions from Rome to Britain, public lectures delivered at the Rice Institute on Sunday afternoons in the autumn of 1942, Rice Institute Pamphlet; v.29, no. 4, October 1942. [p. 257-386].View full digital object online at http://scholarship.rice.edu/handle/1911/9018

Watkin, William Ward, The Church of Tomorrow, New York London, Harper & Brothers, 1936.

Watkin, William Ward, Planning and Building the Modern Church, New York, F.W. Dodge Corp., 1951.